Fig. 3

Wavelet analysis for Campylobacter cases reported between 1989 and 2009 and for temperature and rainfall in England and Wales; a Wavelet power spectrum of the root transformed time-series of daily Campylobacter cases adjusted using a seven-day rolling mean, removal of bank holiday artefacts and adjusted for long term trend; b Wavelet power spectrum of the root transformed time-series of daily temperature; c of daily Rainfall. Low values of the power spectrum are shown in dark blue and high values in dark red. The black lines show the maxima of the undulations of the wavelet power spectrum. The light white shaded areas identify the region influenced by edge; d Global average wavelet power spectrum of the root transformed time-series of Campylobacter cases, the black dots show the 5% significant levels computed based on 500 bootstrapped series; e as d but for averaged temperature